Ytterbium-doped optical fiber, fiber laser, and fiber amplifier

Details Ytterbium-doped optical fiber, fiber laser, and fiber amplifier Ytterbium-doped optical fiber, fiber laser, and fiber amplifier

H - Electricity

01

S

H01S 3/06 (2006.01) G02B 6/02 (2006.01) G02B 6/024 (2006.01) G02B 6/036 (2006.01)

Patent

CA 2721326

An ytterbium-doped optical fiber of the present invention includes: a core which contains ytterbium, aluminum, and phosphorus and does not contain germanium; and a cladding which surrounds this core. The ytterbium concentration in the core in terms of ytterbium oxide is 0.09 to 0.68 mole percent. The molar ratio between the phosphorus concentration in the core in terms of diphosphorus pentoxide and the above ytterbium concentration in terms of ytterbium oxide is 3 to 30. The molar ratio between the aluminum concentration in the core in terms of aluminum oxide and the above ytterbium concentration in terms of ytterbium oxide is 3 to 32. The molar ratio between the above aluminum concentration in terms of aluminum oxide and the above phosphorus concentration in terms of diphosphorus pentoxide is 1 to 2.5.

L'invention concerne une fibre optique dopée à l'ytterbium comprenant une âme et une gaine entourant ladite âme qui contient de l'ytterbium, de l'aluminium et du phosphore mais pas de germanium. Dans l'âme, l'ytterbium est contenu selon une quantité de 0,09 à 0,68 % moles en termes de teneur en oxyde d'ytterbium, le rapport molaire entre la teneur en phosphore (en termes de teneur de pentoxyde de phosphore) et la teneur en ytterbium (en termes de teneur d'oxyde d'ytterbium) est de 3 à 30, le rapport molaire entre la teneur en aluminium (en termes de teneur en oxyde d'aluminium) et la teneur en ytterbium (en termes de teneur d'oxyde d'ytterbium) est de 3 à 32, et le rapport molaire entre la teneur en aluminium (en termes de teneur en oxyde d'aluminium) et la teneur en phosphore (en termes de teneur en pentoxyde de phosphore) est compris entre 1 et 2,5.

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